diff --git a/sys/netinet/tcp_stacks/fastpath.c b/sys/netinet/tcp_stacks/fastpath.c
index 271ea7ad91cb..4912854749ec 100644
--- a/sys/netinet/tcp_stacks/fastpath.c
+++ b/sys/netinet/tcp_stacks/fastpath.c
@@ -60,7 +60,9 @@ __FBSDID("$FreeBSD$");
 #include "opt_tcpdebug.h"
 
 #include <sys/param.h>
+#include <sys/lock.h>
 #include <sys/module.h>
+#include <sys/mutex.h>
 #include <sys/kernel.h>
 #ifdef TCP_HHOOK
 #include <sys/hhook.h>